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X-ray crystal structure of the extended-spectrum AmpC Y221G mutant beta-lactamase at 1.90 Angstrom resolution

Source organism: Escherichia coli K-12
Biochemical function: hydrolase activity
Biological process: response to antibiotic
Cellular component: periplasmic space

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EC 3.5.2.6: Beta-lactamase

Reaction catalysed:
A beta-lactam + H(2)O = a substituted beta-amino acid
Systematic name:
Beta-lactam hydrolase
Alternative Name(s):
  • Ampicillinase
  • Beta-lactamase A, B, C
  • Beta-lactamase AME I
  • Beta-lactamase I-III
  • Cephalosporin-beta-lactamase
  • Cephalosporinase
  • Exopenicillinase
  • Neutrapen
  • Penicillin amido-beta-lactamhydrolase
  • Penicillin beta-lactamase
  • Penicillinase
  • Penicillinase I, II

GO terms

Sequence family

Pfam Protein family (Pfam)
PF00144
Domain description: Beta-lactamase
Occurring in:
  1. Beta-lactamase
The deposited structure of PDB entry 3iwo contains 2 copies of Pfam domain PF00144 (Beta-lactamase) in Beta-lactamase. Showing 1 copy in chain B.

InterPro InterPro annotations
IPR012338
Domain description: Beta-lactamase/transpeptidase-like
Occurring in:
  1. Beta-lactamase
IPR001586
Domain description: Beta-lactamase, class-C active site
Occurring in:
  1. Beta-lactamase
IPR001466
Domain description: Beta-lactamase-related
Occurring in:
  1. Beta-lactamase

Structure domain

CATH CATH domain
3.40.710.10
Class: Alpha Beta
Architecture: 3-Layer(aba) Sandwich
Topology: Beta-lactamase
Homology: DD-peptidase/beta-lactamase superfamily
Occurring in:
  1. Beta-lactamase
The deposited structure of PDB entry 3iwo contains 2 copies of CATH domain 3.40.710.10 (Beta-lactamase) in Beta-lactamase. Showing 1 copy in chain B.

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